00421nam a2200145Ia 4500003000600000005001700006008004100023020001800064040004900082082002100131100002500152245004300177260003500220500002000255NORSU20240731010444.0240220s9999    xx            000 0 und d  a9780840031303  aNORSU Dumaguete (Main Campus ll)cNORSU-MCII  a621.387 W78 2009  aWimenberg,  Nicholas 0aUnderstanding voice over IP technology  bDelmar Cengage learningcc2009  aIncludes index.